bow pads?

My father left me a 1964 Buick Electra convertible before he passed. One of the things he was happy to give me with the car was a new top in the box with bow pads etc. He bought that approx 15 years ago. I'm finally near the time to put the top on and when we took it all out for the box everything looked good except the foam filler in the bow pads turned to dust. I am thinking I could find some 1/4" foam and glue it in as a replacement. Is there anything else that could be used instead of foam?